IMHO after the Russia-Ukraine war, Russia must pay reparations to rebuild the parts of Ukraine it damaged/destroyed.

IMHO after Hamas is destroyed, Israel must pay reparations to rebuild the parts of Gaza it damaged/destroyed.

In a war, it is fair to damage enemy infrastructure, but you are on the hook to rebuild it once the war is over.

There is a lot of precedent.

Germany had to pay reparations under the Treaty of Versailles, and again after WW2.

The US would have had to pay for Hiroshima/Nagasaki except that Japan waived it under the Treaty of San Francisco.